Toy building brick



FIG. 1 is a front right and top isometric view of a toy building brick showing my new design, a rear left and bottom isometric view being a mirror image thereof;

FIG. 2 is a top view of the toy building brick, a bottom view being a mirror image thereof;

FIG. 3 is a front view of the toy building brick, a rear view being a mirror image thereof;

FIG. 4 is a cross-section taken along line 4-4 of FIG. 2 of the toy building brick to show a depth of wells extending therein; and,

FIG. 5 is a cross-sectional view of the toy building brick taken along line 5-5 of FIG. 2 to a depth of wells extending therein. 

CLAIM The ornamental design for a toy building brick, as shown and described. 